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PDF OM5721 Data sheet ( Hoja de datos )
| Número de pieza | OM5721 | |
| Descripción | STB5660 Set-Top Box STB concept | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
OM5721
STB5660 (Set-Top Box) STB
concept
Product specification
Supersedes data of 1998 Aug 18
File under Integrated Circuits, IC02
1999 May 05
1 page  
Philips Semiconductors
STB5660 (Set-Top Box) STB concept
Product specification
OM5721
• Serial multi-channel digital audio output with 16, 18, 20
or 24 bits/sample, compatible either to I2S or Japanese
formats. Output can be set to high-impedance mode via
the external controller.
• Serial Sony/Philips Digital Interface (SPDIF) (IEC 958)
audio output. Output can be set to high-impedance
mode.
1.2.6 GRAPHICS FEATURES
• Graphics is presented in boxes independent of video
format
• Boxes can be up to full screen allowing double buffer
display mechanism
• Two independent graphics planes are available for
background and/or graphics overlay
• Two independent data paths with RGB 4 : 4 : 4 and
YCbCr 4 : 2 : 2 formats available with independent
mixing
• RGB path transparent to YCbCr format
• Screen arrangement of boxes is determined by display
list mechanism which allows for multiple boxes,
background loading, fast switching, scrolling,
overlapping and fading of regions
• Real-time anti-flickering performed in hardware.
Programmable hardware available for off-line
anti-flickering.
• Hard-edged or soft-edged wiping of regions available
• Support of 2, 4, 8, 16 bits/pixel in fixed bit maps format
or coded in accordance to the DVB variable/run length
standard for region based graphics
• Chrominance down-sampling filter switched per region
• Display colours are obtained via Colour Look-Up Tables
(CLUT) or directly from bitmap. CLUT output can be
YCbCrT at 8-bit for each signal component thus
enabling 16 M different colours and 6-bit for T which
gives 64 mixing levels with video. CLUT output can also
be RGBT with same resolutions. Non-linear processing
available by means of LUTs.
• Conversion matrices available to allow any format on
any different data path (RGB or YCbCr)
• Graphics boxes may overlap vertically even inside one
graphics layer due to the use of flexible chained
descriptors
• Internal support for fast 3-D block moves in external
SDRAM through Data Manipulation Unit (DMU)
• DMU allows format conversion and bit manipulation
from a chained list of instructions
• Graphics mechanism can be used for signal generation
in the vertical blanking interval. Useful for teletext, wide
screen signalling, closed caption, etc.
• Support for a single down loadable cursor of 1K pixel
with programmable shape
• Supported shapes are 8 × 128 pixels, 16 × 64 pixels,
32 × 32 pixels, 64 × 16 pixels and 128 × 8 pixels
• Cursor colours obtained via two 16 entry CLUTs with
YCbCrT at 6, 4, 4 respectively
• 2 bits and RGBT at 4, 4, 4 respectively 4 bits (or 4, 5, 3,
respectively 4 bits). Mixing of cursor with video and
graphics in 4 levels.
• Cursor can be moved freely across the screen without
overlapping restrictions.
2 GENERAL DESCRIPTION
2.1 Introduction
Philips Semiconductors Set-Top Box (STB) concept is a
Digital Media Broadcast (DMB) platform designed to help
developers bring the right product to market at the right
time, with a minimum of risk. A complete hardware and
software solution for fully-featured digital cable, satellite
and terrestrial system, it is based around a powerful,
programmable embedded microprocessor core, allowing
manufacturers to develop and rapidly evaluate system
designs and test application software.
This programmability is the key to maintaining flexibility
and reducing risk. Application software can be easily
modified to meet changing requirements, so highly
featured and differentiated STB designs can be brought
quickly to market. It also allows flexible handling of
graphics, so manufacturers can implement menus,
electronic program guides and the sophisticated
graphics-based features expected by today’s users.
Sophisticated hardware is supported by a full suite of
software, developed in partnership with customers to meet
real-world needs and provide the reliability required for
consumer electronics products.
1999 May 05
5
5 Page 
Philips Semiconductors
STB5660 (Set-Top Box) STB concept
Product specification
OM5721
4.5 Memory
4.5.1 NON-VOLATILE MEMORY (NVM)
A 32-kbyte NVM is implemented with an EEPROM
connected to the I2C-bus to allow for channel data storage,
etc.
4.5.4 FLASH
2 Mbytes [2 × (512K × 16)]; this can be up-graded to
4 Mbytes [2 × (1M × 16)].
Two flash banks are needed to allow code to be run from
one bank while writing to the other.
4.5.2 DRAM
2 Mbytes (1M × 16); 60 ns fast or hyper-page mode.
4.5.5 VIDEO AND GRAPHICS RAM
4 Mbytes SDRAM [2 × (1M × 16)] at 81 MHz.
4.5.3 BOOT ROM
256 kbytes (256 kbytes × 8) to allow for ROM boot up and
also to provide ROM emulation.
4.5.6 MEMORY OPTIONS
Surface mount links can select memory configuration.
Remark: The boot chip select is selectable between Boot
ROM and Flash.
4.6 Connectors
Table 2 The main board connectors
CONNECTOR
Optical SPDIF
SPDIF
SCART
3 Phonos (RCAs)
SVHS
CCIR 656 connector
JTAG
DEBUG socket
RS232
DESCRIPTION
A SPDIF signal from the SAA7215 is brought out via an optical output connector.
To allow connection of the Philips SAA2505 AC3/MPEG7.1 surround sound.
1 standard SCART, audio/video output signals only.
CVBS, right audio and left audio.
The Y/C output from the SAA7215 is brought out to a standard SVHS connector.
A connector to the CCIR 656 YUV output from the SAA7215.
A standard JTAG connector for Boundary Scan testing.
A surface mount DEBUG socket allowing connection to a Philips REDDX connector via a
conversion board to allow connection to a REDDNET or REDDROM board.
An additional RS232-C (±12 V) interface to provide a board connector for debug use.
IEEE 1394
One half of a suitable RS232 driver chip will be used for signal level conversion.
The Philips PDI1394L11 and PDI1394P11 is implemented to provide half-duplex 1394 access
from the SAA7214.
IEEE 1294
Under isolation mode the power for the physical IC will be taken from the bus via the switching
regulator. The option between isolated and non-isolated is selectable via option links.
Two 1394 connectors are available on the back panel.
Subject to Electro-Static Discharge (ESD), standard logic are implemented as buffers to
provide 1284 to a 25-way D-type female connector on the back panel.
1999 May 05
11
11 Page | ||
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